Douglas J Macmaster Jr insider trades: Martek Biosciences (MATK) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Douglas reports to the SEC
Open-market buys and sales
2 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 23, 2009 | MATK | ↓ Sell | 4,907 | $23.80 | $117K | Direct | Jan 19, 2010 (118d) |
| Jun 18, 2008 | MATK | ↓ Sell | 8,000 | $33.61 | $269K | Direct | Jun 18, 2008 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About Douglas J Macmaster Jr's insider trades
Douglas J Macmaster Jr is a director at Martek Biosciences (MATK). Since Jun 18, 2008, Douglas has reported no open-market purchases and 2 sales worth $386K on SEC Form 4. There have been no open-market trades in the last 12 months.
Their filings also include grants and awards (9 filings), option exercises (7 filings), shares returned to the company (1 filing), other transactions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MATK insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.